package main

import (
	"bytes"
	"encoding/json"
	"errors"
	"io"

	"git.ipao.vip/rogee/creator-hub/internal/phasea"
	"github.com/gofiber/fiber/v3"
)

type accountRequest struct {
	ID                  string `json:"id"`
	ProfileID           string `json:"profile_id"`
	CredentialReference struct {
		ID       string `json:"id"`
		Provider string `json:"provider"`
		Key      string `json:"key"`
	} `json:"credential_reference"`
}

func registerPhaseA(app *fiber.App, store *phasea.Store) {
	app.Post("/api/phase-a/accounts", func(c fiber.Ctx) error {
		var input accountRequest
		if err := decodePhaseA(c, &input); err != nil {
			return phaseAError(c, err)
		}
		err := store.CreateAccount(c.Context(), phasea.Account{
			ID: input.ID, ProfileID: input.ProfileID, CredentialReferenceID: input.CredentialReference.ID,
			CredentialProvider: input.CredentialReference.Provider, CredentialKey: input.CredentialReference.Key,
		})
		if err != nil {
			return phaseAError(c, err)
		}
		return c.Status(fiber.StatusCreated).JSON(map[string]string{"id": input.ID, "profile_id": input.ProfileID})
	})

	app.Post("/api/phase-a/accounts/:id/pause", func(c fiber.Ctx) error {
		if err := store.PauseAccount(c.Context(), c.Params("id")); err != nil {
			return phaseAError(c, err)
		}
		return c.SendStatus(fiber.StatusNoContent)
	})

	app.Post("/api/phase-a/runtimes", func(c fiber.Ctx) error {
		var input phasea.RuntimeBinding
		if err := decodePhaseA(c, &input); err != nil {
			return phaseAError(c, err)
		}
		if err := store.BindRuntime(c.Context(), input); err != nil {
			return phaseAError(c, err)
		}
		return c.Status(fiber.StatusCreated).JSON(map[string]string{"id": input.ID})
	})

	app.Delete("/api/phase-a/runtimes/:id", func(c fiber.Ctx) error {
		if err := store.ReleaseRuntime(c.Context(), c.Params("id")); err != nil {
			return phaseAError(c, err)
		}
		return c.SendStatus(fiber.StatusNoContent)
	})

	app.Post("/api/phase-a/drafts", func(c fiber.Ctx) error {
		var input phasea.Draft
		if err := decodePhaseA(c, &input); err != nil {
			return phaseAError(c, err)
		}
		if err := store.CreateDraft(c.Context(), input); err != nil {
			return phaseAError(c, err)
		}
		return c.Status(fiber.StatusCreated).JSON(map[string]string{"id": input.ID})
	})

	app.Post("/api/phase-a/confirmations", func(c fiber.Ctx) error {
		var input phasea.Confirmation
		if err := decodePhaseA(c, &input); err != nil {
			return phaseAError(c, err)
		}
		if err := store.Confirm(c.Context(), input); err != nil {
			return phaseAError(c, err)
		}
		return c.Status(fiber.StatusCreated).JSON(map[string]string{"id": input.ID})
	})

	app.Post("/api/phase-a/tasks", func(c fiber.Ctx) error {
		var input phasea.Task
		if err := decodePhaseA(c, &input); err != nil {
			return phaseAError(c, err)
		}
		task, inserted, err := store.Enqueue(c.Context(), input)
		if err != nil {
			return phaseAError(c, err)
		}
		status := fiber.StatusOK
		if inserted {
			status = fiber.StatusCreated
		}
		return c.Status(status).JSON(task)
	})

	app.Post("/api/phase-a/tasks/:id/cancel", func(c fiber.Ctx) error {
		if err := store.CancelTask(c.Context(), c.Params("id")); err != nil {
			return phaseAError(c, err)
		}
		return c.SendStatus(fiber.StatusNoContent)
	})

	app.Post("/api/phase-a/mock/execute", func(c fiber.Ctx) error {
		var input struct {
			WorkerID string `json:"worker_id"`
			Outcome  string `json:"outcome"`
		}
		if err := decodePhaseA(c, &input); err != nil {
			return phaseAError(c, err)
		}
		execution, err := store.ExecuteMock(c.Context(), input.WorkerID, input.Outcome)
		if err != nil {
			return phaseAError(c, err)
		}
		return c.JSON(execution)
	})

	app.Get("/api/phase-a/audit", func(c fiber.Ctx) error {
		events, err := store.Audit(c.Context())
		if err != nil {
			return phaseAError(c, err)
		}
		return c.JSON(events)
	})
}

func decodePhaseA(c fiber.Ctx, destination any) error {
	decoder := json.NewDecoder(bytes.NewReader(c.Body()))
	decoder.DisallowUnknownFields()
	if err := decoder.Decode(destination); err != nil {
		return phasea.ErrInvalid
	}
	if err := decoder.Decode(&struct{}{}); !errors.Is(err, io.EOF) {
		return phasea.ErrInvalid
	}
	return nil
}

func phaseAError(c fiber.Ctx, err error) error {
	status := fiber.StatusInternalServerError
	message := "phase A operation failed"
	switch {
	case errors.Is(err, phasea.ErrInvalid):
		status, message = fiber.StatusBadRequest, phasea.ErrInvalid.Error()
	case errors.Is(err, phasea.ErrConflict):
		status, message = fiber.StatusConflict, phasea.ErrConflict.Error()
	case errors.Is(err, phasea.ErrNotFound):
		status, message = fiber.StatusNotFound, phasea.ErrNotFound.Error()
	}
	return c.Status(status).JSON(map[string]string{"error": message})
}